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Fullerene separation through use of organic cages

a technology of organic cages and fullerene, which is applied in the field of fullerene separation through use of organic cages, can solve the problems of preventing commercialization of fullerene, and it is difficult to separate discrete fullerene components from crude fullerene mixtures

Inactive Publication Date: 2014-10-09
UNIV OF COLORADO THE REGENTS OF
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for separating fullerenes from mixtures containing them using a special molecule called a compound of Formula I or II. These compounds can be easily prepared using a process called alkyne metathesis. The compounds have a unique structure that allows them to form complexes with fullerenes, which can then be easily separated from other molecules. The method can be used to extract specific fullerenes like C60, C70, or a mixture of them. The technical effect of this invention is a more efficient and effective way to separate fullerenes from mixtures containing them.

Problems solved by technology

The difficulties in the preparation, isolation and purification of fullerenes have greatly hindered their commercial exploitation.
In particular, due to the highly similar structure, solubility, and reactivity of the fullerenes in a reaction mixture, with the various fullerenes only being differentiated in their molecular weight, it has been difficult to separate the discrete fullerene components from a crude fullerene mixture.

Method used

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  • Fullerene separation through use of organic cages
  • Fullerene separation through use of organic cages
  • Fullerene separation through use of organic cages

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Embodiment Construction

[0039]Three-dimensional (3-D) molecular cages, particularly shape-persistent, covalent organic polyhedrons (COPs) with well-defined pore dimensions have attracted considerable attention due to their numerous applications in host-guest chemistry, chemical sensing, catalysis, and gas adsorption. Current synthesis of rigid molecular cages is dominated by supramolecular chemistry including metal coordination (see, e.g., Olenyuk, B. et al., Nature 1999, 398, 796-799; Seidel, S. R. et al., J. Acc. Chem. Res. 2002, 35, 972-983; and Fiedler, D. et al., Acc. Chem. Res. 2005, 38, 349-358) and hydrogen-bonding (see, e.g., Liu, Y. Z. et al., Science 2011, 333, 436-440), which usually provides the target species with high efficiency through the self-assembly process. However, the supramolecular cages usually tend to be labile, and are sensitive to external environmental factors such as pH, temperature, solvent, etc. While supramolecular cages have been extensively studied, purely organic covalen...

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Abstract

Provided herein are compositions useful in the separation of fullerenes from a mixture comprising fullerenes. Also provided herein are methods of making the compositions, as well as methods of using the compositions for fullerene separation.

Description

RELATED APPLICATION[0001]This application claims the benefit U.S. Provisional application 61 / 551,753, filed on Oct. 26, 2011, the contents of which are incorporated herein in its entirety.GOVERNMENT SUPPORT[0002]This invention was made with government support under grant numbers CBET 1033255 and DMR-1055705 awarded by the National Science Foundation. The government has certain rights in the invention.BACKGROUND OF THE INVENTION[0003]Fullerenes are one of the four types of naturally occurring forms of carbon. They are distinguished by their multi-faceted, closed structure, where the carbon-carbon bonds form a framework of hexagons and pentagons that resembles the familiar hexagon / pentagon surface of a soccer ball. In general, more than one arrangement of the hexagons and pentagons is possible, leading to a great variety of possible isomers for any particular number of carbon atoms in a fullerene. One of the most common fullerenes is C60, also referred to as Buckminsterfullerene, the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07D487/00C01B31/02
CPCC07D487/22C07D487/00C01B31/0213B82Y30/00B82Y40/00C01B32/156
Inventor ZHANG, WEIWANG, QIZHANG, CHENXI
Owner UNIV OF COLORADO THE REGENTS OF